Good Morning! It's 20 and snowing outside and 40 inside. Our furnace went out yesterday because the maintenance staff never replaced the filter. Of course they work in the rooms and their office has a separate heater so only the front desk has to freeze. On top of that my Alk is dropping over 1 Dkh everyday. I have precipitation and can't figure out how to stop it. I am on the ledge about to give up. 2021 sucks so far.
I read the thread you posted and I dont have any experience with this. From reading the articles in the chemistry forum
I suspect your magnesium test is wrong. What you are seeing is a typical case of too low magnesium. Once it starts to precipitate you cant really judge by the alk drop. The more you add the more you precipitate.
Sadly, many of the articles are gone from the chemistry forum. They were valuable information
Magnesium is what is supposed to stop precipitation.
From Randy's article
The extent to which magnesium gets onto calcium carbonate surfaces depends strongly on the amount of magnesium in solution. The more there is, the more it gets onto the surfaces. If magnesium is lower than normal, then it may not adequately get onto growing calcium carbonate surfaces, allowing the deposition of calcium carbonate to proceed faster than it otherwise would, potentially leading to increased abiotic precipitation of calcium carbonate from seawater onto objects such as heaters and pumps. Often the inability to maintain adequate calcium and alkalinity despite extensive supplementation, and the precipitation of significant amounts of calcium carbonate on heaters and pumps, are signs that the water has inadequate magnesium.
Me again. Or your alk test is wrong and your levels are much higher than what you think.
Since your tank is doing something it isn't supposed to based on the numbers you are seeing then one of your tests is giving you bad information.
